Case Study
Sediment Cap Evaluation, Design and Permitting, Mission Bay Ferry Terminal Project: California
By Bridgette R. DeShields, Principal, Technical Director - Permitting and Planning
OUR CHALLENGE
Contaminated sediments were discovered during construction of a new ferry terminal for the Port of San Francisco. Elevated concentrations of PAHs encountered within a portion of the dredge prism required a rapid response to ensure that the project remained on schedule. To address the contamination, our team needed to prepare a conceptual design of an engineered cap and to conduct discussions with permitting agencies, including the U.S. Army Corps of Engineers.
OUR APPROACH
We served as Engineer of Record for design of the engineered cap required to manage contaminated sediments. Our engineering team’s multilayered cap design included an erosion protection layer to protect the underlying isolation sand cap from hydrodynamic forces caused by vessel traffic, tidal currents, and storms.
OUR IMPACT
Our work provided a timely and cost-effective solution that allowed the ferry terminal project to move forward. The project will provide much-needed regional public transportation facilities and further enhance existing maritime activity along the working waterfront of San Francisco.
Published
May 17, 2019
Key Contact
Ms. Bridgette DeShields has more than 35 years of experience and is a specialist in regulatory strategy, site investigation, site... Full bio